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Root/branches/meklort/i386/boot2/boot.c

Source at commit 712 created 13 years 2 months ago.
By meklort, Fixed boot log issue as mentioned by Azimutz. No code that needs to output to the boot log should do so after finalizeBootStruct and setupBooterLog.
1/*␊
2 * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.␊
3 *␊
4 * @APPLE_LICENSE_HEADER_START@␊
5 * ␊
6 * Portions Copyright (c) 1999-2003 Apple Computer, Inc. All Rights␊
7 * Reserved. This file contains Original Code and/or Modifications of␊
8 * Original Code as defined in and that are subject to the Apple Public␊
9 * Source License Version 2.0 (the "License"). You may not use this file␊
10 * except in compliance with the License. Please obtain a copy of the␊
11 * License at http://www.apple.com/publicsource and read it before using␊
12 * this file.␊
13 * ␊
14 * The Original Code and all software distributed under the License are␊
15 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER␊
16 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,␊
17 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,␊
18 * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT. Please see the␊
19 * License for the specific language governing rights and limitations␊
20 * under the License.␊
21 * ␊
22 * @APPLE_LICENSE_HEADER_END@␊
23 */␊
24/* ␊
25 * Mach Operating System␊
26 * Copyright (c) 1990 Carnegie-Mellon University␊
27 * Copyright (c) 1989 Carnegie-Mellon University␊
28 * All rights reserved. The CMU software License Agreement specifies␊
29 * the terms and conditions for use and redistribution.␊
30 */␊
31␊
32/*␊
33 * INTEL CORPORATION PROPRIETARY INFORMATION␊
34 *␊
35 * This software is supplied under the terms of a license agreement or ␊
36 * nondisclosure agreement with Intel Corporation and may not be copied ␊
37 * nor disclosed except in accordance with the terms of that agreement.␊
38 *␊
39 * Copyright 1988, 1989 by Intel Corporation␊
40 */␊
41␊
42/*␊
43 * Copyright 1993 NeXT Computer, Inc.␊
44 * All rights reserved.␊
45 */␊
46␊
47/*␊
48 * Completely reworked by Sam Streeper (sam_s@NeXT.com)␊
49 * Reworked again by Curtis Galloway (galloway@NeXT.com)␊
50 */␊
51␊
52␊
53#include "boot.h"␊
54#include "bootstruct.h"␊
55#include "fake_efi.h"␊
56#include "sl.h"␊
57#include "libsa.h"␊
58#include "ramdisk.h"␊
59#include "platform.h"␊
60#include "graphics.h"␊
61␊
62#include "modules.h"␊
63␊
64long gBootMode; /* defaults to 0 == kBootModeNormal */␊
65bool gOverrideKernel;␊
66static char gBootKernelCacheFile[512];␊
67static char gCacheNameAdler[64 + 256];␊
68char *gPlatformName = gCacheNameAdler;␊
69char gRootDevice[512];␊
70char gMKextName[512];␊
71char gMacOSVersion[8];␊
72#ifndef OPTION_ROM␊
73bool gEnableCDROMRescan;␊
74bool gScanSingleDrive;␊
75#endif␊
76␊
77␊
78int bvCount = 0;␊
79//int␉menucount = 0;␊
80int gDeviceCount = 0; ␊
81␊
82BVRef bvr;␊
83BVRef menuBVR;␊
84BVRef bvChain;␊
85␊
86//static void selectBiosDevice(void);␊
87static unsigned long Adler32(unsigned char *buffer, long length);␊
88static bool getOSVersion(char *str);␊
89␊
90#ifndef OPTION_ROM␊
91static bool gUnloadPXEOnExit = false;␊
92#endif␊
93␊
94/*␊
95 * How long to wait (in seconds) to load the␊
96 * kernel after displaying the "boot:" prompt.␊
97 */␊
98#define kBootErrorTimeout 5␊
99␊
100/*␊
101 * Default path to kernel cache file␊
102 */␊
103#define kDefaultCachePath "/System/Library/Caches/com.apple.kernelcaches/kernelcache"␊
104␊
105//==========================================================================␊
106// Zero the BSS.␊
107␊
108static void zeroBSS(void)␊
109{␊
110␉extern char _DATA__bss__begin, _DATA__bss__end;␊
111␉extern char _DATA__common__begin, _DATA__common__end;␊
112␉␊
113␉bzero(&_DATA__bss__begin, (&_DATA__bss__end - &_DATA__bss__begin));␊
114␉bzero(&_DATA__common__begin, (&_DATA__common__end - &_DATA__common__begin));␊
115}␊
116␊
117//==========================================================================␊
118// Malloc error function␊
119␊
120static void malloc_error(char *addr, size_t size, const char *file, int line)␊
121{␊
122␉stop("\nMemory allocation error! Addr=0x%x, Size=0x%x, File=%s, Line=%d\n", (unsigned)addr, (unsigned)size, file, line);␊
123}␊
124␊
125//==========================================================================␊
126//Initializes the runtime. Right now this means zeroing the BSS and initializing malloc.␊
127//␊
128void initialize_runtime(void)␊
129{␊
130␉zeroBSS();␊
131␉malloc_init(0, 0, 0, malloc_error);␊
132}␊
133␊
134//==========================================================================␊
135// execKernel - Load the kernel image (mach-o) and jump to its entry point.␊
136␊
137int ExecKernel(void *binary)␊
138{␊
139 entry_t kernelEntry;␊
140 int ret;␊
141␉␊
142 bootArgs->kaddr = bootArgs->ksize = 0;␊
143␉execute_hook("ExecKernel", (void*)binary, NULL, NULL, NULL);␊
144␊
145 ret = DecodeKernel(binary,␊
146 &kernelEntry,␊
147 (char **) &bootArgs->kaddr,␊
148 (int *)&bootArgs->ksize );␊
149␊
150 if ( ret != 0 )␊
151 return ret;␊
152 // Reserve space for boot args␊
153 reserveKernBootStruct();␊
154␉␊
155 // Load boot drivers from the specifed root path.␊
156␉execute_hook("DecodedKernel", (void*)binary, NULL, NULL, NULL);␊
157␊
158␉␊
159␉setupFakeEfi();␊
160␉␊
161 if (!gHaveKernelCache) {␊
162␉␉LoadDrivers("/");␊
163 }␊
164␉␊
165 clearActivityIndicator();␊
166␉␊
167 if (gErrors) {␊
168 printf("Errors encountered while starting up the computer.\n");␊
169 printf("Pausing %d seconds...\n", kBootErrorTimeout);␊
170 sleep(kBootErrorTimeout);␊
171 }␊
172␉␊
173␉md0Ramdisk();␊
174␉␊
175 verbose("Starting Darwin %s\n",( archCpuType == CPU_TYPE_I386 ) ? "x86" : "x86_64");␊
176#ifndef OPTION_ROM␊
177 // Cleanup the PXE base code.␊
178␉␊
179 if ( (gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit ) {␊
180␉␉if ( (ret = nbpUnloadBaseCode()) != nbpStatusSuccess )␊
181 {␊
182 ␉printf("nbpUnloadBaseCode error %d\n", (int) ret);␊
183 sleep(2);␊
184 }␊
185 }␊
186#endif ␊
187 bool dummyVal;␊
188␉if (getBoolForKey(kWaitForKeypressKey, &dummyVal, &bootInfo->bootConfig) && dummyVal)␊
189␉{␊
190␉␉printf("Press any key to continue...");␊
191␉␉getc();␊
192␉}␊
193␉␉␊
194␉if (bootArgs->Video.v_display == VGA_TEXT_MODE)␊
195␉{␊
196␉␉setVideoMode( GRAPHICS_MODE, 0 );␊
197␉␉// Draw gray screen. NOTE: no boot image, that's in the gui module␊
198#ifndef OPTION_ROM␊
199␉␉if(!gVerboseMode) drawColorRectangle(0, 0, DEFAULT_SCREEN_WIDTH, DEFAULT_SCREEN_HEIGHT, 0x01); ␊
200#endif␊
201␉}␊
202␊
203 execute_hook("Kernel Start", (void*)kernelEntry, (void*)bootArgs, NULL, NULL);␉// Notify modules that the kernel is about to be started␊
204␊
205␉setupBooterLog();␊
206␉␊
207 finalizeBootStruct(); ␉␊
208␊
209␉// Jump to kernel's entry point. There's no going back now.␊
210 startprog( kernelEntry, bootArgs );␊
211␉␊
212 // Not reached␊
213␉␊
214 return 0;␊
215}␊
216␊
217//==========================================================================␊
218// This is the entrypoint from real-mode which functions exactly as it did␊
219// before. Multiboot does its own runtime initialization, does some of its␊
220// own things, and then calls common_boot.␊
221void boot(int biosdev)␊
222{␊
223␉initialize_runtime();␊
224␉// Enable A20 gate before accessing memory above 1Mb.␊
225␉enableA20();␊
226␉common_boot(biosdev);␊
227}␊
228␊
229//==========================================================================␊
230// The 'main' function for the booter. Called by boot0 when booting␊
231// from a block device, or by the network booter.␊
232//␊
233// arguments:␊
234// biosdev - Value passed from boot1/NBP to specify the device␊
235// that the booter was loaded from.␊
236//␊
237// If biosdev is kBIOSDevNetwork, then this function will return if␊
238// booting was unsuccessful. This allows the PXE firmware to try the␊
239// next boot device on its list.␊
240void common_boot(int biosdev)␊
241{␊
242 int status;␊
243 char *bootFile;␊
244 unsigned long adler32;␊
245 bool quiet;␊
246 bool firstRun = true;␊
247 bool instantMenu;␊
248#ifndef OPTION_ROM␊
249 bool rescanPrompt;␊
250#endif␊
251 unsigned int allowBVFlags = kBVFlagSystemVolume|kBVFlagForeignBoot;␊
252 unsigned int denyBVFlags = kBVFlagEFISystem;␊
253␉␊
254#ifndef OPTION_ROM␊
255 // Set reminder to unload the PXE base code. Neglect to unload␊
256 // the base code will result in a hang or kernel panic.␊
257 gUnloadPXEOnExit = true;␊
258#endif␊
259␉␊
260 // Record the device that the booter was loaded from.␊
261 gBIOSDev = biosdev & kBIOSDevMask;␊
262␉␊
263 // Initialize boot info structure.␊
264 initKernBootStruct();␊
265␉␊
266␉initBooterLog();␊
267␉␊
268 // Setup VGA text mode.␊
269 // Not sure if it is safe to call setVideoMode() before the␊
270 // config table has been loaded. Call video_mode() instead.␊
271#if DEBUG␊
272 printf("before video_mode\n");␊
273#endif␊
274 video_mode( 2 ); // 80x25 mono text mode.␊
275#if DEBUG␊
276 printf("after video_mode\n");␊
277#endif␊
278␉␊
279 // Scan and record the system's hardware information.␊
280 scan_platform();␊
281␉␊
282 // First get info for boot volume.␊
283 scanBootVolumes(gBIOSDev, 0);␊
284 bvChain = getBVChainForBIOSDev(gBIOSDev);␊
285 setBootGlobals(bvChain);␊
286␉␊
287 // Load boot.plist config file␊
288 status = loadSystemConfig(&bootInfo->bootConfig);␊
289␊
290 if (getBoolForKey(kQuietBootKey, &quiet, &bootInfo->bootConfig) && quiet) {␊
291 gBootMode |= kBootModeQuiet;␊
292 }␊
293␉␊
294 // Override firstRun to get to the boot menu instantly by setting "Instant Menu"=y in system config␊
295 if (getBoolForKey(kInsantMenuKey, &instantMenu, &bootInfo->bootConfig) && instantMenu) {␊
296 firstRun = false;␊
297 }␊
298␉␊
299#ifndef OPTION_ROM␊
300␉// Enable touching a single BIOS device only if "Scan Single Drive"=y is set in system config.␊
301 if (getBoolForKey(kScanSingleDriveKey, &gScanSingleDrive, &bootInfo->bootConfig) && gScanSingleDrive) {␊
302 gScanSingleDrive = true;␊
303 }␊
304␉␊
305␉// Create a list of partitions on device(s).␊
306 if (gScanSingleDrive)␊
307␉{␊
308␉␉scanBootVolumes(gBIOSDev, &bvCount);␊
309 } ␊
310␉else ␊
311#endif␊
312␉{␊
313␉␉scanDisks(gBIOSDev, &bvCount);␊
314 }␊
315␉␊
316␉// Create a separated bvr chain using the specified filters.␊
317 bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
318␉gBootVolume = selectBootVolume(bvChain);␊
319␉␊
320␉␊
321␉// Intialize module system␊
322␉if(init_module_system())␊
323␉{␊
324␉␉load_all_modules();␊
325␉}␊
326␉␊
327␉execute_hook("ModulesLoaded", NULL, NULL, NULL, NULL);␊
328␊
329␉␊
330#ifndef OPTION_ROM␊
331 // Loading preboot ramdisk if exists.␊
332 loadPrebootRAMDisk();␊
333␉␊
334 // Disable rescan option by default␊
335 gEnableCDROMRescan = false;␊
336␉␊
337 // Enable it with Rescan=y in system config␊
338 if (getBoolForKey(kRescanKey, &gEnableCDROMRescan, &bootInfo->bootConfig) && gEnableCDROMRescan) {␊
339 gEnableCDROMRescan = true;␊
340 }␊
341␉␊
342 // Ask the user for Rescan option by setting "Rescan Prompt"=y in system config.␊
343 rescanPrompt = false;␊
344 if (getBoolForKey(kRescanPromptKey, &rescanPrompt , &bootInfo->bootConfig) && rescanPrompt && biosDevIsCDROM(gBIOSDev)) {␊
345 gEnableCDROMRescan = promptForRescanOption();␊
346 }␊
347#endif␊
348␉␊
349␊
350␉␊
351␉␊
352#if DEBUG␊
353 printf(" Default: %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBootVolume, gBootVolume->biosdev, gBootVolume->part_no, gBootVolume->flags);␊
354 printf(" bt(0,0): %d, ->biosdev: %d, ->part_no: %d ->flags: %d\n", gBIOSBootVolume, gBIOSBootVolume->biosdev, gBIOSBootVolume->part_no, gBIOSBootVolume->flags);␊
355 getc();␊
356#endif␊
357␉␊
358␉␊
359␉␊
360 setBootGlobals(bvChain);␊
361␉␊
362 // Parse args, load and start kernel.␊
363 while (1) {␊
364 const char *val;␊
365 int len;␊
366 int trycache;␊
367 long flags, cachetime, kerneltime, exttime, sleeptime, time;␊
368 int ret = -1;␊
369 void *binary = (void *)kLoadAddr;␊
370 bool tryresume;␊
371 bool tryresumedefault;␊
372 bool forceresume;␊
373␉␉␊
374 // additional variable for testing alternate kernel image locations on boot helper partitions.␊
375 char bootFileSpec[512];␊
376␉␉␊
377 // Initialize globals.␊
378␉␉␊
379 sysConfigValid = false;␊
380 gErrors = false;␊
381␉␉␊
382 status = getBootOptions(firstRun);␊
383 firstRun = false;␊
384 if (status == -1) continue;␊
385␉␉␊
386 status = processBootOptions();␊
387 // Status==1 means to chainboot␊
388 if ( status == 1 ) break;␊
389 // Status==-1 means that the config file couldn't be loaded or that gBootVolume is NULL␊
390 if ( status == -1 )␊
391 {␊
392␉␉␉// gBootVolume == NULL usually means the user hit escape.␊
393␉␉␉if(gBootVolume == NULL)␊
394␉␉␉{␊
395␉␉␉␉freeFilteredBVChain(bvChain);␊
396#ifndef OPTION_ROM␊
397␉␉␉␉if (gEnableCDROMRescan)␊
398␉␉␉␉␉rescanBIOSDevice(gBIOSDev);␊
399#endif␊
400␉␉␉␉␊
401␉␉␉␉bvChain = newFilteredBVChain(0x80, 0xFF, allowBVFlags, denyBVFlags, &gDeviceCount);␊
402␉␉␉␉setBootGlobals(bvChain);␊
403␉␉␉}␊
404␉␉␉continue;␊
405 }␊
406␉␉␊
407␉␉␊
408␉␉␊
409 // Other status (e.g. 0) means that we should proceed with boot.␊
410␉␉␉␉␊
411␉␉␊
412␉␉// Find out which version mac os we're booting.␊
413␉␉getOSVersion(gMacOSVersion);␊
414␉␉␊
415␉␉if (platformCPUFeature(CPU_FEATURE_EM64T)) {␊
416␉␉␉archCpuType = CPU_TYPE_X86_64;␊
417␉␉} else {␊
418␉␉␉archCpuType = CPU_TYPE_I386;␊
419␉␉}␊
420␉␉if (getValueForKey(karch, &val, &len, &bootInfo->bootConfig)) {␊
421␉␉␉if (strncmp(val, "i386", 4) == 0) {␊
422␉␉␉␉archCpuType = CPU_TYPE_I386;␊
423␉␉␉}␊
424␉␉}␊
425␉␉␊
426␉␉// Notify moduals that we are attempting to boot␊
427␉␉execute_hook("PreBoot", NULL, NULL, NULL, NULL);␊
428␊
429␉␉if (!getBoolForKey (kWake, &tryresume, &bootInfo->bootConfig)) {␊
430␉␉␉tryresume = true;␊
431␉␉␉tryresumedefault = true;␊
432␉␉} else {␊
433␉␉␉tryresumedefault = false;␊
434␉␉}␊
435␉␉␊
436␉␉if (!getBoolForKey (kForceWake, &forceresume, &bootInfo->bootConfig)) {␊
437␉␉␉forceresume = false;␊
438␉␉}␊
439␉␉␊
440␉␉if (forceresume) {␊
441␉␉␉tryresume = true;␊
442␉␉␉tryresumedefault = false;␊
443␉␉}␊
444␉␉␊
445␉␉while (tryresume) {␊
446␉␉␉const char *tmp;␊
447␉␉␉BVRef bvr;␊
448␉␉␉if (!getValueForKey(kWakeImage, &val, &len, &bootInfo->bootConfig))␊
449␉␉␉␉val="/private/var/vm/sleepimage";␊
450␉␉␉␊
451␉␉␉// Do this first to be sure that root volume is mounted␊
452␉␉␉ret = GetFileInfo(0, val, &flags, &sleeptime);␊
453␉␉␉␊
454␉␉␉if ((bvr = getBootVolumeRef(val, &tmp)) == NULL)␊
455␉␉␉␉break;␊
456␉␉␉␊
457␉␉␉// Can't check if it was hibernation Wake=y is required␊
458␉␉␉if (bvr->modTime == 0 && tryresumedefault)␊
459␉␉␉␉break;␊
460␉␉␉␊
461␉␉␉if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat))␊
462␉␉␉␉break;␊
463␉␉␉␊
464␉␉␉if (!forceresume && ((sleeptime+3)<bvr->modTime)) {␊
465␉␉␉␉printf ("Hibernate image is too old by %d seconds. Use ForceWake=y to override\n",bvr->modTime-sleeptime);␊
466␉␉␉␉break;␊
467␉␉␉}␊
468␉␉␉␊
469␉␉␉HibernateBoot((char *)val);␊
470␉␉␉break;␊
471␉␉}␊
472␉␉␊
473 // Reset cache name.␊
474 bzero(gCacheNameAdler + 64, sizeof(gCacheNameAdler) - 64);␊
475␉␉␊
476 sprintf(gCacheNameAdler + 64, "%s,%s", gRootDevice, bootInfo->bootFile);␊
477␉␉␊
478 adler32 = Adler32((unsigned char *)gCacheNameAdler, sizeof(gCacheNameAdler));␊
479␉␉␊
480 if (getValueForKey(kKernelCacheKey, &val, &len, &bootInfo->bootConfig)) {␊
481 strlcpy(gBootKernelCacheFile, val, len+1);␊
482 } else {␊
483 sprintf(gBootKernelCacheFile, "%s.%08lX", kDefaultCachePath, adler32);␊
484 }␊
485␉␉␊
486 // Check for cache file.␊
487 trycache = (((gBootMode & kBootModeSafe) == 0) &&␊
488 !gOverrideKernel &&␊
489 (gBootFileType == kBlockDeviceType) &&␊
490 (gMKextName[0] == '\0') &&␊
491 (gBootKernelCacheFile[0] != '\0'));␊
492␉␉␊
493␉␉verbose("Loading Darwin %s\n", gMacOSVersion);␊
494␉␉␊
495 if (trycache) do {␊
496␉␉␉␊
497 // if we haven't found the kernel yet, don't use the cache␊
498 ret = GetFileInfo(NULL, bootInfo->bootFile, &flags, &kerneltime);␊
499 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)) {␊
500 trycache = 0;␊
501 break;␊
502 }␊
503 ret = GetFileInfo(NULL, gBootKernelCacheFile, &flags, &cachetime);␊
504 if ((ret != 0) || ((flags & kFileTypeMask) != kFileTypeFlat)␊
505 || (cachetime < kerneltime)) {␊
506 trycache = 0;␊
507 break;␊
508 }␊
509 ret = GetFileInfo("/System/Library/", "Extensions", &flags, &exttime);␊
510 if ((ret == 0) && ((flags & kFileTypeMask) == kFileTypeDirectory)␊
511 && (cachetime < exttime)) {␊
512 trycache = 0;␊
513 break;␊
514 }␊
515 if (kerneltime > exttime) {␊
516 exttime = kerneltime;␊
517 }␊
518 if (cachetime != (exttime + 1)) {␊
519 trycache = 0;␊
520 break;␊
521 }␊
522 } while (0);␊
523␉␉␊
524 do {␊
525 if (trycache) {␊
526 bootFile = gBootKernelCacheFile;␊
527 verbose("Loading kernel cache %s\n", bootFile);␊
528 ret = LoadFile(bootFile);␊
529 binary = (void *)kLoadAddr;␊
530 if (ret >= 0) {␊
531 break;␊
532 }␊
533 }␊
534 bootFile = bootInfo->bootFile;␊
535␉␉␉␊
536 // Try to load kernel image from alternate locations on boot helper partitions.␊
537 sprintf(bootFileSpec, "com.apple.boot.P/%s", bootFile);␊
538 ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
539 ␉ ␉ if (ret == -1)␊
540 ␉ ␉ {␊
541␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.R/%s", bootFile);␊
542␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
543␉␉␉␉if (ret == -1)␊
544␉␉␉␉{␊
545␉␉␉␉␉sprintf(bootFileSpec, "com.apple.boot.S/%s", bootFile);␊
546␉␉␉␉␉ret = GetFileInfo(NULL, bootFileSpec, &flags, &time); ␊
547␉␉␉␉␉if (ret == -1)␊
548␉␉␉␉␉{␊
549␉␉␉␉␉␉// Not found any alternate locations, using the original kernel image path.␊
550␉␉␉␉␉␉strcpy(bootFileSpec, bootFile);␊
551␉␉␉␉␉}␊
552␉␉␉␉}␊
553 }␊
554␉␉␉␊
555 verbose("Loading kernel %s\n", bootFileSpec);␊
556 ret = LoadThinFatFile(bootFileSpec, &binary);␊
557 if (ret <= 0 && archCpuType == CPU_TYPE_X86_64)␊
558 {␊
559␉␉␉␉archCpuType = CPU_TYPE_I386;␊
560␉␉␉␉ret = LoadThinFatFile(bootFileSpec, &binary);␉␉␉␉␊
561 }␊
562␉␉␉␊
563 } while (0);␊
564␉␉␊
565 clearActivityIndicator();␊
566#if DEBUG␊
567 printf("Pausing...");␊
568 sleep(8);␊
569#endif␊
570␉␉␊
571 if (ret <= 0) {␊
572␉␉␉printf("Can't find %s\n", bootFile);␊
573␉␉␉␊
574␉␉␉sleep(1);␊
575#ifndef OPTION_ROM␊
576 if (gBootFileType == kNetworkDeviceType) {␊
577 // Return control back to PXE. Don't unload PXE base code.␊
578 gUnloadPXEOnExit = false;␊
579 break;␊
580 }␊
581#endif␊
582 } else {␊
583 /* Won't return if successful. */␊
584␉␉␉// Notify modules that ExecKernel is about to be called␊
585 ret = ExecKernel(binary);␊
586 }␊
587 }␊
588 ␊
589 // chainboot␊
590 if (status==1) {␊
591␉␉if (getVideoMode() == GRAPHICS_MODE) {␉// if we are already in graphics-mode,␊
592␉␉␉setVideoMode(VGA_TEXT_MODE, 0);␉// switch back to text mode␊
593␉␉}␊
594 }␊
595#ifndef OPTION_ROM␊
596 if ((gBootFileType == kNetworkDeviceType) && gUnloadPXEOnExit) {␊
597␉␉nbpUnloadBaseCode();␊
598 }␊
599#endif␊
600}␊
601␊
602/*!␊
603 Selects a new BIOS device, taking care to update the global state appropriately.␊
604 */␊
605/*␊
606 static void selectBiosDevice(void)␊
607 {␊
608 struct DiskBVMap *oldMap = diskResetBootVolumes(gBIOSDev);␊
609 CacheReset();␊
610 diskFreeMap(oldMap);␊
611 oldMap = NULL;␊
612 ␊
613 int dev = selectAlternateBootDevice(gBIOSDev);␊
614 ␊
615 BVRef bvchain = scanBootVolumes(dev, 0);␊
616 BVRef bootVol = selectBootVolume(bvchain);␊
617 gBootVolume = bootVol;␊
618 setRootVolume(bootVol);␊
619 gBIOSDev = dev;␊
620 }␊
621 */␊
622␊
623static bool getOSVersion(char *str)␊
624{␊
625␉bool valid = false;␊
626␉config_file_t systemVersion;␊
627␉const char *val;␊
628␉int len;␊
629␉␊
630␉if (!loadConfigFile("/System/Library/CoreServices/SystemVersion.plist", &systemVersion))␊
631␉{␊
632␉␉valid = true;␊
633␉}␊
634␉else if (!loadConfigFile("/System/Library/CoreServices/ServerVersion.plist", &systemVersion))␊
635␉{␊
636␉␉valid = true;␊
637␉}␊
638␉␊
639␉if (valid)␊
640␉{␊
641␉␉if (getValueForKey(kProductVersion, &val, &len, &systemVersion))␊
642␉␉{␊
643␉␉␉// getValueForKey uses const char for val␊
644␉␉␉// so copy it and trim␊
645␉␉␉*str = '\0';␊
646␉␉␉strncat(str, val, MIN(len, 4));␊
647␉␉}␊
648␉␉else␊
649␉␉␉valid = false;␊
650␉}␊
651␉␊
652␉return valid;␊
653}␊
654␊
655#define BASE 65521L /* largest prime smaller than 65536 */␊
656#define NMAX 5000␊
657// NMAX (was 5521) the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1␊
658␊
659#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}␊
660#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);␊
661#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);␊
662#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);␊
663#define DO16(buf) DO8(buf,0); DO8(buf,8);␊
664␊
665unsigned long Adler32(unsigned char *buf, long len)␊
666{␊
667 unsigned long s1 = 1; // adler & 0xffff;␊
668 unsigned long s2 = 0; // (adler >> 16) & 0xffff;␊
669 unsigned long result;␊
670 int k;␊
671␉␊
672 while (len > 0) {␊
673 k = len < NMAX ? len : NMAX;␊
674 len -= k;␊
675 while (k >= 16) {␊
676 DO16(buf);␊
677 buf += 16;␊
678 k -= 16;␊
679 }␊
680 if (k != 0) do {␊
681 s1 += *buf++;␊
682 s2 += s1;␊
683 } while (--k);␊
684 s1 %= BASE;␊
685 s2 %= BASE;␊
686 }␊
687 result = (s2 << 16) | s1;␊
688 return OSSwapHostToBigInt32(result);␊
689}␊
690

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